Expand by minors along the first column.
A. x - 6y + 2
B. x + 6y - 2
C. x - 6y - 2
D. -x - 6y - 2
Answer: C
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Evaluate by correctly positioning the decimal point.42.826 × 10-3
A. 0.042826 B. 42,826 C. 4.2826 D. 0.42826
Find the exact value of the expression.tan-1 (-1)
A. 
B. 
C. - 
D. 
Use U = universal set = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 3, 5, 8}, B = {2, 3, 5, 7}, and C = {1, 4, 9} to find the set.(A ? B) ? C
A. {2, 3, 5} B. {1, 2, 3, 5} C. {1, 2, 3} D. {1, 2, 3, 4, 5, 9}
Solve the problem.A lumber yard has fixed costs of $4,726.80 per day and variable costs of $0.1 per board-foot produced. Lumber sells for $1.90 per board-foot. How many board-feet must be produced and sold daily to break even?
A. 1,750 board-feet B. 2,626 board-feet C. 2,363 board-feet D. 47,268 board-feet